<?php

header("Content-Type:text/html; charset=utf-8");

if($_POST['submit']){

    $upfiles = new Upload();

    $upfiles->upload_file();

}

class Upload{

    public $upload_name;                    //上传文件名

    public $upload_tmp_name;                //上传临时文件名

    public $upload_final_name;                //上传文件的最终文件名

    public $upload_target_dir;                //文件被上传到的目标目录

    public $upload_target_path;                //文件被上传到的最终路径

    public $upload_filetype ;                //上传文件类型

    public $allow_uploadedfile_type;        //允许的上传文件类型

    public $upload_file_size;                //上传文件的大小

    public $allow_uploaded_maxsize=;     //允许上传文件的最大值

    //构造函数

    public function __construct()

    {

        $this->upload_name = $_FILES["file"]["name"]; //取得上传文件名

        $this->upload_filetype = $_FILES["file"]["type"];

        $this->upload_tmp_name = $_FILES["file"]["tmp_name"];

        $this->allow_uploadedfile_type = array('jpeg','jpg','png','gif','bmp','doc','zip','rar','txt','wps');

        $this->upload_file_size = $_FILES["file"]["size"];

        $this->upload_target_dir="./upload";

    }

    //文件上传

    public function upload_file()

    {

        $upload_filetype = $this->getFileExt($this->upload_name);

        if(in_array($upload_filetype,$this->allow_uploadedfile_type))

        {

            if($this->upload_file_size < $this->allow_uploaded_maxsize)

            {

                if(!is_dir($this->upload_target_dir))

                {

                    mkdir($this->upload_target_dir);

                    chmod($this->upload_target_dir,);

                }

                $this->upload_final_name = date("YmdHis").rand(,).'.'.$upload_filetype;

                $this->upload_target_path = $this->upload_target_dir."/".$this->upload_final_name;

                if(!move_uploaded_file($this->upload_tmp_name,$this->upload_target_path))

                    echo "<font color=red>文件上传失败！</font>";

            }

            else

            {

                echo("<font color=red>文件太大,上传失败！</font>");

            }

        }

        else

        {

            echo("不支持此文件类型，请重新选择");

        }

    }

   /**

    *获取文件扩展名

    *@param String $filename 要获取文件名的文件

    */

   public function getFileExt($filename){

           $info = pathinfo($filename);

           return $info["extension"];

   }

}

?>

<form enctype="multipart/form-data" method="POST" action="">

　　<input type="file" name="file"><input type="submit" name="submit" value="上传">

</form>